// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_COMPILER_JS_INTRINSIC_LOWERING_H_
#define V8_COMPILER_JS_INTRINSIC_LOWERING_H_

#include "src/base/compiler-specific.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/graph-reducer.h"
#include "src/globals.h"

namespace v8 {
namespace internal {

// Forward declarations.
class Callable;


namespace compiler {

// Forward declarations.
class CommonOperatorBuilder;
struct FieldAccess;
class JSOperatorBuilder;
class JSGraph;
class SimplifiedOperatorBuilder;


// Lowers certain JS-level runtime calls.
class V8_EXPORT_PRIVATE JSIntrinsicLowering final
    : public NON_EXPORTED_BASE(AdvancedReducer) {
 public:
  enum DeoptimizationMode { kDeoptimizationEnabled, kDeoptimizationDisabled };

  JSIntrinsicLowering(Editor* editor, JSGraph* jsgraph,
                      DeoptimizationMode mode);
  ~JSIntrinsicLowering() final {}

  const char* reducer_name() const override { return "JSIntrinsicLowering"; }

  Reduction Reduce(Node* node) final;

 private:
  Reduction ReduceCreateIterResultObject(Node* node);
  Reduction ReduceDebugIsActive(Node* node);
  Reduction ReduceDeoptimizeNow(Node* node);
  Reduction ReduceCreateJSGeneratorObject(Node* node);
  Reduction ReduceGeneratorClose(Node* node);
  Reduction ReduceGeneratorGetContext(Node* node);
  Reduction ReduceGeneratorGetInputOrDebugPos(Node* node);
  Reduction ReduceAsyncGeneratorReject(Node* node);
  Reduction ReduceAsyncGeneratorResolve(Node* node);
  Reduction ReduceGeneratorSaveInputForAwait(Node* node);
  Reduction ReduceGeneratorGetResumeMode(Node* node);
  Reduction ReduceIsInstanceType(Node* node, InstanceType instance_type);
  Reduction ReduceIsJSReceiver(Node* node);
  Reduction ReduceIsSmi(Node* node);
  Reduction ReduceFixedArrayGet(Node* node);
  Reduction ReduceFixedArraySet(Node* node);
  Reduction ReduceSubString(Node* node);
  Reduction ReduceToInteger(Node* node);
  Reduction ReduceToLength(Node* node);
  Reduction ReduceToNumber(Node* node);
  Reduction ReduceToObject(Node* node);
  Reduction ReduceToString(Node* node);
  Reduction ReduceCall(Node* node);
  Reduction ReduceGetSuperConstructor(Node* node);

  // TODO(turbofan): typedarray.js support; drop once TypedArrays are
  // converted to proper CodeStubAssembler based builtins.
  Reduction ReduceArrayBufferViewField(Node* node, FieldAccess const& access);
  Reduction ReduceArrayBufferViewWasNeutered(Node* node);
  Reduction ReduceMaxSmi(Node* node);
  Reduction ReduceTypedArrayMaxSizeInHeap(Node* node);

  // TODO(turbofan): collection.js support; drop once Maps and Sets are
  // converted to proper CodeStubAssembler based builtins.
  Reduction ReduceJSCollectionGetTable(Node* node);
  Reduction ReduceStringGetRawHashField(Node* node);
  Reduction ReduceTheHole(Node* node);

  // TODO(turbofan): JavaScript builtins support; drop once all uses of
  // %_ClassOf in JavaScript builtins are eliminated.
  Reduction ReduceClassOf(Node* node);

  Reduction Change(Node* node, const Operator* op);
  Reduction Change(Node* node, const Operator* op, Node* a, Node* b);
  Reduction Change(Node* node, const Operator* op, Node* a, Node* b, Node* c);
  Reduction Change(Node* node, const Operator* op, Node* a, Node* b, Node* c,
                   Node* d);
  Reduction Change(Node* node, Callable const& callable,
                   int stack_parameter_count);

  Graph* graph() const;
  JSGraph* jsgraph() const { return jsgraph_; }
  Isolate* isolate() const;
  CommonOperatorBuilder* common() const;
  JSOperatorBuilder* javascript() const;
  SimplifiedOperatorBuilder* simplified() const;
  DeoptimizationMode mode() const { return mode_; }

  JSGraph* const jsgraph_;
  DeoptimizationMode const mode_;
};

}  // namespace compiler
}  // namespace internal
}  // namespace v8

#endif  // V8_COMPILER_JS_INTRINSIC_LOWERING_H_
